Exploratory search systems are built specifically to help the user in his cognitive consuming search tasks like learning or topic investigation. Some of these systems are built on the top of linked data and use semantics to provide cognitively-optimized search experiences. Thanks to their richness and to their connected nature ...

Evaluate the wireless business opportunity & strategy for an MSO to deploy a Small Cell Network for MNOs leveraging existing Cable assets and Wi-Fi network deployment Key Objectives of the analysis are to: Evaluate MNO Value Proposition: Evaluate and compare the MNO costs for deploying small cell and Wi-Fi coverage ...

Range extension of pico cells facilitated by muting of macro cells has been the main load balancing strategy for LTE co-channel HetNets and standardized under the moniker of enhanced Inter-cell Interference Co-ordination (eICIC) in 3GPP. In order to adapt to varying load due to user mobility or traffic activity, both ...

We study two closely related problems: (a) showing that a program transformation is correct and (b) propagating a program invariant through a sequence of transformations. The second problem is motivated by an application where invariants on a program are used to enhance both the scope and the quality of the ...

SDN research directions as outlined in IRTF RG [1] outlines i) The need for more flexibility and programmability at the data plane level and ii) The need for higher-level languages for programming together with testing and debugging. There are three fundamental challenges behind these directions (assuming that local function or ...

The viability of device to device(D2D) communication on uplink resources as also the benefits accruing from network control over such communication, on licensed spectrum, are quite well understood today. We investigate the merits of a particular system instantiation based on these two tenets. The challenge of scheduling communication between two ...

Power control is an effective method to guarantee the resource sharing between cellular and D2D links for D2D (device-to-device) communications. In this work, we study the power optimization to maximize the sum rate of all coexistent links. We explicitly put priority for cellular link to guarantee QoS (quality of service) ...

an inter-ONU communication mechanism with optical line terminal remotely controllable featuring an electro-optic switch in the remote node is proposed. Latency reduction will be achieved when the switching time is in the level of microsecond

Coordinated Multi Point (CoMP) technology has been considered as a promising means to mitigate inter-cell interference and has great potential to significantly improve the system capacity as well as the spectral efficiency for cell-edge users. TDD system like TD-LTE-Advanced is especially suitable for downlink CoMP operation because accurate channel state ...

Multiple Input Multiple Output (MIMO) systems use multiple antennas at the transmitter end and at the receiver end of a connection to dramatically increase capacity. With these benefits, MIMO is being incorporated into industry standards and deployed in LTE and WiMAX systems. But can MIMO also be applied to microwave ...

Historically, maximum air throughput was governed by the physical and mathematical laws put forth by scientists such as Harry Nyquist and Claude Shannon. Now, intelligent header compression technology is breaking the laws of science to push more bits per second into the air. This article explains how air throughput is ...

Data Confidentiality or Cloud Computing? A true dilemma worthy of Hamlet and a reality for users aiming to exploit computational services in the cloud. Sensitive data can be protected by encryption, but if any computation is to be performed in the cloud, then the decryption key must be available somewhere ...

Asymmetric modulation schemes are candidates for conveying quality feedback in the form of multi-level ACK/NACK in a system employing reliability-based HARQ. Asymmetric QPSK (A-QPSK) modulation, for example, enables to convey one ACK level and three NACK levels with unequal error protection of the ACK and NACK levels, each NACK level ...

Abstract An open converged metro-access network approach allows for sharing optical layer resources like fibers and optical spectrum among different services and operators. We demonstrated experimentally the feasibility of such a concept by the simultaneous operation of multiple services showing different modulation formats and multiplexing techniques. Flexible access nodes are ...

This paper discusses two approaches of adapting the size of Hybrid-ARQ (HARQ) retransmissions in a 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) uplink system. One goal of communication systems is to achieve a reliable transmission with a minimum utilization of the channel. In case of a decoding error ...

An open access network approach allows for sharing optical layer resources like fibers and optical spectrum among different services and operators at the same time. In a field trial the feasibility of such a concept has been demonstrated. Flexible access nodes are implemented including amplification and dispersion management to generate ...

A driver for new waveforms is to better enable multiple access in the light of the requirements of future 5G wireless communication systems. The scenarios, which initiate those requirements, considered by the 5GNOW project, are driven by machine-type communication and the tactile internet, by coordinated multi-point (CoMP) and by fragmented ...

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